ANNEX XIIICRITICAL LEVELS FOR THE PROTECTION OF VEGETATION
Averaging period | Critical level | Margin of tolerance |
|---|---|---|
Sulphur dioxide | ||
Calendar year and winter (1 October to 31 March) | 20 μg/m3 | None |
Oxides of nitrogen | ||
Calendar year | 30 μg/m3 NOx | None |
Averaging period | Critical level | Margin of tolerance |
|---|---|---|
Sulphur dioxide | ||
Calendar year and winter (1 October to 31 March) | 20 μg/m3 | None |
Oxides of nitrogen | ||
Calendar year | 30 μg/m3 NOx | None |